Exercise and Atrial Fibrillation: Current Evidence, Knowledge Gaps, and Future Directions

Area of Science:

• Cardiology
• Sports Medicine
• Exercise Physiology

Background:

• Atrial fibrillation (AF) is a prevalent cardiac arrhythmia causing significant morbidity and mortality.
• The link between physical exercise and AF risk is complex, exhibiting both protective and detrimental effects.
• A U-shaped association exists between exercise intensity and AF risk.

Purpose of the Study:

• To review current evidence on exercise's effects on atrial fibrillation.
• To identify knowledge gaps in the exercise-AF relationship.
• To propose future research directions in this field.

Main Methods:

• Systematic literature review of studies investigating exercise and AF.
• Analysis of evidence on moderate-intensity versus high-intensity exercise impacts.
• Examination of proposed mechanisms linking exercise to AF.

Main Results:

• Moderate exercise demonstrates benefits for AF management by improving cardiovascular health and reducing atrial fibrosis.
• Excessive high-intensity endurance exercise may elevate AF risk, particularly in young athletes, through mechanisms like atrial remodeling and inflammation.
• Current guidelines advocate for moderate-intensity aerobic activity in AF management.

Conclusions:

• Exercise is a crucial lifestyle intervention for AF, but intensity matters.
• Understanding the nuanced effects of different exercise intensities is vital for optimizing AF patient outcomes.
• Further research is needed to elucidate the precise mechanisms and refine exercise recommendations for AF.